OpenAI Codex vs Claude Code: Hands-On Python Benchmark for Devs
Dev.to AI
•
Generative AI
AI Research
OpenAI relaunched Codex this year as a full agentic CLI that lives in your terminal and talks to GPT-5 class models. Claude Code did the same thing for Anthropic, six months earlier. Both want to be the assistant you actually merge code from. We pointed both at the same Python project and tracked what each one shipped. The codebase under test: a mid-sized Flask + SQLAlchemy service with a real pytest suite and a handful of slow, gnarly modules begging to be refactored.